Hi,
i have a txtfile with the format <Nr>tab<word>tab<other stuff>new line and i want to sort the <word>-colum with a perl script.
My textfile:
i found this posting, but i am to stupid to find a fitting REGEX for my program =(
unix.com/shell-programming-scripting/15334-sort-array-strings-perl.html
so i've got 1to5 numbers, a tab (\t), the word , another tab and some random stuff
Hi,
When using sort on an associative array:
foreach $key (sort(keys(%opalfabet))){
$value = $opalfabet{$key};
$result .= $value;
}
How does it handle double values?
It seems to me that it removes them, is that true? If so, is there a way to get... (2 Replies)
I have an array full of string values that need to be sorted, but if a value starts with (regex) 0^ it should be at the beginning of the array. Otherwise the array should be sorted normally using ascii sort.
Please help me create the sub to pass to the sort function. (7 Replies)
Hi All
I want to search a string from an array in Perl. If a match occurs, assign that string to a variable else assign 'No match'. I tried writing the script as follows but it's in vain. Please help me..
#!/usr/bin/perl
use strict;
my $NER;
my @text=("ORG","PER");
... (4 Replies)
Hi All,
I have an array in perl as @match = (201001,201002,201001,201002);
I am trying to sort this array as
@match = sort(@match);
print "@match";
I dont see the output sorted any answers
I also tried another way, but still the results are not sorted
foreach my $match (sort { $a... (2 Replies)
#!/usr/bin/perl
my @arr=("hello", "how", "are", "you");
$l=length(@arr);
print $l;
This print 1.Why?
How can i print the array size = 4?
I want to store these in an array.
hello
how
are
you
And then i want to access these element through indexing.
How can i do this? (4 Replies)
Hi,
I would like to do the following sorting, but the output is not what i expected. Why 222 and 2222 are not at the last two elements of array?
awk 'BEGIN{a="22";a="2222";a="33";a="44";a="222";a="11";a="22";a="33";asort(a); for (i=1;i<=8;i++) print a}'
11
22
22
222
2222
33
33
44... (1 Reply)
I have an array and two variables as below,
I need to check if $datevar is present in $filename.
If so, i need to replace $filename with the values in the array.
I need the output inside an ARRAY
How can this be done.
Any help will be appreciated. Thanks in advance. (2 Replies)
Hi all,
Not sure if this should be in the programming forum, but I believe it will get more response under the Shell Programming and Scripting FORUM.
Am trying to write a customized df script in Perl and need some help with regards to using arrays and file handlers.
At the moment am... (3 Replies)
sub uniq {
my %h;
return grep { !$h{$_}++ } @_
}
The above code is to remove duplicates from array.
I am having hard time understanding below things (basically around highlighted code in bold)-
when was the value inserted in hash?
and are we only adding a key in Hash not... (1 Reply)
Discussion started by: Tanu
1 Replies
LEARN ABOUT DEBIAN
universal::require
UNIVERSAL::require(3pm) User Contributed Perl Documentation UNIVERSAL::require(3pm)NAME
UNIVERSAL::require - require() modules from a variable
SYNOPSIS
# This only needs to be said once in your program.
require UNIVERSAL::require;
# Same as "require Some::Module"
my $module = 'Some::Module';
$module->require or die $@;
# Same as "use Some::Module"
BEGIN { $module->use or die $@ }
DESCRIPTION
If you've ever had to do this...
eval "require $module";
to get around the bareword caveats on require(), this module is for you. It creates a universal require() class method that will work with
every Perl module and its secure. So instead of doing some arcane eval() work, you can do this:
$module->require;
It doesn't save you much typing, but it'll make alot more sense to someone who's not a ninth level Perl acolyte.
Methods
require
my $return_val = $module->require or die $@;
my $return_val = $module->require($version) or die $@;
This works exactly like Perl's require, except without the bareword restriction, and it doesn't die. Since require() is placed in the
UNIVERSAL namespace, it will work on any module. You just have to use UNIVERSAL::require somewhere in your code.
Should the module require fail, or not be a high enough $version, it will simply return false and not die. The error will be in $@ as well
as $UNIVERSAL::require::ERROR.
$module->require or die $@;
use
my $require_return = $module->use or die $@;
my $require_return = $module->use(@imports) or die $@;
Like "UNIVERSAL::require", this allows you to "use" a $module without having to eval to work around the bareword requirement. It returns
the same as require.
Should either the require or the import fail it will return false. The error will be in $@.
If possible, call this inside a BEGIN block to emulate a normal "use" as closely as possible.
BEGIN { $module->use }
SECURITY NOTES
UNIVERSAL::require makes use of "eval STRING". In previous versions of UNIVERSAL::require it was discovered that one could craft a class
name which would result in code being executed. This hole has been closed. The only variables now exposed to "eval STRING" are the
caller's package, filename and line which are not tainted.
UNIVERSAL::require is taint clean.
COPYRIGHT
Copyright 2001, 2005 by Michael G Schwern <schwern@pobox.com>.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
See http://www.perl.com/perl/misc/Artistic.html
AUTHOR
Michael G Schwern <schwern@pobox.com>
SEE ALSO
Module::Load, "require" in perlfunc, <http://dev.perl.org/rfc/253.pod>
perl v5.10.0 2009-03-30 UNIVERSAL::require(3pm)